[XEN PATCH 00/11] address some violations of MISRA C Rule 20.7

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

Hi all,

this series aims to refactor some macros that cause violations of MISRA C Rule
20.7 ("Expressions resulting from the expansion of macro parameters shall be
enclosed in parentheses"). All the macros touched by these patches are in some
way involved in violations, and the strategy adopted to bring them into
compliance is to add parentheses around macro arguments where needed.

Given that the community has previously requested a deviation from the rule, as
stated in docs/misra/deviations.rst, and reported below for convenience [1],
some macro parameters do not need any adjusting (e.g., when used as lhs to
an assignment in statement expressions).

Patch 1 is taken, with adjustments, from [2]. Patches 2 and 3 are taken from [3]
without any modifications. All other patches are new in this series and are
pairwise indipendent.

[1] - Code violating Rule 20.7 is safe when macro parameters are used:
       (1) as function arguments;
       (2) as macro arguments;
       (3) as array indices;
       (4) as lhs in assignments.

[2] 
https://lore.kernel.org/xen-devel/b93a64b93ef4210f5fe96368c2522e5e71e9c87c.1709896401.git.nicola.vetrini@xxxxxxxxxxx/
[3] 
https://lore.kernel.org/xen-devel/cover.1710762555.git.nicola.vetrini@xxxxxxxxxxx/

Nicola Vetrini (11):
  xen/list: address violations of MISRA C Rule 20.7
  xen/xsm: add parentheses to comply with MISRA C Rule 20.7
  xen/efi: efibind: address violations of MISRA C Rule 20.7
  xentrace: address violation of MISRA C Rule 20.7
  xen: address MISRA C Rule 20.7 violation in generated hypercall
  xen/efi: address violations of MISRA C Rule 20.7
  xen/page_alloc: address violations of MISRA C Rule 20.7
  x86/altcall: address violations of MISRA C Rule 20.7
  x86/msi: address violation of MISRA C Rule 20.7 and coding style
  x86/hvm: address violations of Rule 20.7
  x86/public: hvm: address violations of MISRA C Rule 20.7

 xen/arch/arm/include/asm/arm64/efibind.h  |   4 +-
 xen/arch/x86/hvm/hvm.c                    |   6 +-
 xen/arch/x86/include/asm/alternative.h    |  76 ++++++------
 xen/arch/x86/include/asm/hvm/save.h       |   4 +-
 xen/arch/x86/include/asm/msi.h            |  47 +++----
 xen/arch/x86/include/asm/x86_64/efibind.h |   4 +-
 xen/common/page_alloc.c                   |   2 +-
 xen/include/efi/efiapi.h                  |   3 +-
 xen/include/public/arch-x86/xen.h         |   2 +-
 xen/include/public/trace.h                |   2 +-
 xen/include/xen/list.h                    | 143 +++++++++++-----------
 xen/include/xsm/dummy.h                   |   4 +-
 xen/scripts/gen_hypercall.awk             |   4 +-
 13 files changed, 151 insertions(+), 150 deletions(-)

-- 
2.34.1